acoustical methods  search
BTgeophysical methods
 .acoustical methods
NTsonar methods
UFacoustic methods
RTacoustical logging
 borehole televiewers
 impedance
 air guns
 backscattering
 Brillouin spectra
 deep-tow methods
 Doppler effect
 echo sounding
 eikonal equation
 geophones
 geophysical surveys
 GLORIA
 Green function
 hydrophones
 reflection methods
 refraction method
SNAlso search acoustical. For surveys, search with geophysical surveys and an area. For surveys, also index geophysical surveys and the area.